Glass flask, erlenmeyer (conical), made by VEB Werk für Technisches Glas, Ilmenau, German Democratic Republic, 1969-1990. The object has the inscriptions "RASOTHERM", "500ml" and "MADE IN GDR" inside a white lined square; a white square writing box; the company logo contained within a box and graduation lines at 50mL intervals from 200mL to 500mL.
